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Photopatterning Proteins and Cells in Aqueous Environment Using TiO2 Photocatalysis
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Photopatterning Proteins and Cells in Aqueous Environment Using TiO2 Photocatalysis

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Photocatalytic degradation of AZO dyes by supported TiO2 + UV in aqueous solution

C Zhu1, L Wang, L Kong

  • 1Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, People's Republic of China. zhucm@ms.giec.ac.cn

Chemosphere
|November 1, 2000
PubMed

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Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para position.